| Autor: |
Z. M. Li, V. A. Rudakov, X. F. Liang, V. A. Sledkov, V. V. Taranenko |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall). |
| DOI: |
10.1109/piers-fall48861.2019.9021509 |
| Popis: |
In this paper, a high gain dual circularly polarized patch antenna array containing 5 × 5 radiating elements and operating at S band is presented. Each radiating element contains a radiating patch and a parasitic patch placed above a metal reflector. All components of a beam forming network and micro strip conductors exciting patches are formed on a one surface of a dielectric substrate mounted on a back surface of a metal reflector. The radiating patch comprises four metal strips bent towards a metal reflector and directly connected to exciting micro strip lines through holes made in the metal reflector and a dielectric substrate. Each patch excited by 3-dB branch line coupler radiates right hand circular polarization and left hand circular polarization. The reflector has dimensions 4.3λ 0 × 4.7λ 0 , where λ 0 is wave length in a free space. Calculated directivity of such antenna array is 22.3 dBi at central frequency f 0 . Measured return loss is −20.1 dB and isolation is 20.5 dB within the required 11% frequency band. Measured axial ratio is less than 1.5dB and cross polarization better than −25dB. Measured insertion loss of a beam forming network is −1.3 dB therefore estimated gain of both circular polarization is 21 dB. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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